Apart from the fact Africa is a continent as opposed to a country, I think something in the African Jungles sweeping down to the vast plains.  Japan and maybe somewhere in Europe like Holland or Belgium.

The charts are already two years out of date, but are fascinating to pour over.  There will always be an inherent inflation in BitCoin while coins are being mined while out pacing their implementation in real world applications.

Would like to see an update if the original poster is still around?